Original article

Hwang et al. 2016;59(5):218-225 • The relationship among birth season, sunlight exposure and allergic diseases KoreanJM, J Pediatr http://dx.doi.org/10.3345/kjp.2016.59.5.218 pISSN 1738-1061•eISSN 2092-7258

Korean J Pediatr

The relationships among birth season, sunlight exposure during infancy, and allergic disease Jung Min Hwang, MD, Se Hyun Oh, MD, Mee Yong Shin, MD, PhD Department of Pediatrics, Soonchunhyang University Bucheon Hospital, Soonchunhyang University College of Medicine, Bucheon, Korea

Purpose: The recent increase in the prevalence of allergic diseases is hypothetically attributed to immune dysregulation in turn caused by a reduction in exposure to sunlight. We explored relationships between birth season, sunlight exposure, exercise duration, and an allergic disease. Methods: We performed a questionnaire-based survey on allergic diseases among elementary school students. Birth time was categorized according to the season (summer and winter). Results: The prevalence of atopic dermatitis (AD) “symptoms ever” was higher in the children born in winter than in those born in summer (adjusted odds ratio [aOR], 1.24; 95% confidence interval [CI], 1.03–1.49; P=0.024). Birth in winter was associated with an increase in the “symptoms in the past 12 months” prevalence of food allergy (FA) (aOR, 1.56; 95% CI, 1.09–2.24; P=0.015). The lifetime prevalence of allergic diseases except FA was higher in the children whose parents considered their sunlight exposure prior to 24 months of ageas inadequate than those who considered their exposure as adequate (“diagnosis ever” asthma: aOR, 1.4; 95% CI, 1.17–1.67; P

The relationships among birth season, sunlight exposure during infancy, and allergic disease.

The recent increase in the prevalence of allergic diseases is hypothetically attributed to immune dysregulation in turn caused by a reduction in expos...
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